Cardboard container



E. G. GEREKE CARDBOARD CONTAINER v Filed April 24: 192?.

@Y MMM QA/Lpg HTTORNEYS PatentedlAug. 26, 1924.

UNITED STATES EDWARD G. GEBEKE, 0F ST. LOUIS, IISSOURI.

cumnonnn CONTAINER.

Application led April 24, 1922. Serial No. 558,161.

To all whom t may con/:em:

Be it known that I, EDWARD G. GEREKE, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Cardboard Containers, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a cardboard container of the general type described in my U. S. Patent No. 1,437,512, dated Dec. 5, 1922, namely, a combined baking utensil and wrapper for a baked article consisting of an outer shell of cardboard o1' the like provided With an inner lining of parchment paper or the like that is secured to said outer shell by a substance which permits the inner lining to separate automatically or pull away from the outer shell when the container is subjected to heat.

When a container of the kind above referred to is used as a baking utensil for bakery products of a spongy or fluffy nature, such as angel cake, the sides of the cake baked in the container usually do not conform accurately to the side walls of the container, but in most instances, sag, contract or bulge inwardly, thereby producing a baked article whose outer surface is not smooth, symmetrical and even. While I am not able to explain why bakery products like angel cake act in this manner when baked in a receptacle or container composed of an outer cardboard shell provided with a paper inner lining that separates from the outer shell during the baking operation, I have discovered that if small holes or orifices are formed in the vertically-disposed portion of the container, such, for example, as the side walls, bakery products like angel cake can be baked satisfactorily in such containers without liability of the sides of the cake sagging or bulging inwardly. Therefore, I claim to have originated a new and useful baking utensil for angel cake and bakery products of a similar nature, which, in itsrsimplest form, consists of a container'formed of flexible cardboard or similar material provided with an inner lining of thin, flexible paper and having numerous orifices or small holes formedin the vertically-disposed portion or portions of the container.

Figure 1 of the drawings is a perspective view of a container constructed in accordance with my present invention, showing to clin how the inner lining adheres to the outer shell when the dough or other material to be baked is first placed in the container.

Fi ure 2 is a perspective view, showing the inner lining separated from the outer shell and the inner lining and shell partly stri ped off the baked article; and

.igure 3 isa vertical transverse sectional view of a container that is adapted to be used for baking a ring cake or other article of annular form. y

In Figures 1 and 2 of the drawings A designates the outer shell of my improved container, which is preferably composed of flexible cardboard or other similar sheet material, and B designates an'inner lining of liexible parchment paper or other suitable material that is secured to the inner face'of said shell. The inner lining B is secured to the outer shell A in such a way that it will adhere tightly to said shell when the wet dough is rst placed in the container and also during the first part of the baking operation, thus eliminating the possibility of the inner lining wrinkling or sagging over the dough, and will separate automatically from the outer. shell during the baking operation, thus facilitating the removal of the container from the baked article. Preferably, paraffin is used for securing the inner lining to the outer shell of the container on account of the fact that parafiin will cause the inner lining tightly to the shell when the container 1s cold, but will permit the inner lining to separate automatically or pull away from the outer shell during the baking operation, thereby enabling the container to be easily removed from the baked article by first taking off or pulling away the outer shell and then strippin off the inner lining from the baked article, 1t being possible to do this without liability of damaging the baked article or pulling chunks out of the sides of same, due to the fact that the inner lining is I dol not wish formed from vthin aper. it to be understood, owever, that paraffin is the only subst-ance that .can be used for securing the inner lining to the outer shell of the container', the essential thing being to use a substance that will act as an adhesive when the dough is first placed in the container, but whose adhesive properties will be destroyed'when the container 1s subjected to the temperature usually existing in a baking oven.

As shown' in Figures 1 andl 2, the vertically-tlisposed portion of the container, such, for example, as theside walls, are-provided with numerous orifices or small holes 1 that extend through the inner lining and outer shell. W'hen a container of the `above construction is used for baking bakery products of a spongy or fluffy nature, such as angel cake, the sides of the cake will conform accurately to the side walls of the container, dueto the fact that the oriices 1 in the side walls of the container prevent the cake from sagging or bulgin inwardly at points in proximity to saidside walls.

The particular type or construction of the container is immaterial, but l prefer to con-` struct theouter shell A of the container like an ordinary folding cardboard box and combine the inner lining vB with the sheet of cardboard that constitutes said outer shell betere said sheet is cut and scored, the preferred method being to arrange a sheet B of parchment paper or other suitable thin paper upon a sheet i of cardboard or the like, connect said sheets together by parathn or some other substance a similar nature, then cut and score or crease said connected sheets so as to `form a box blank provided with co-operating interlocking portions av, and thereafter fold said blank and connect the interlocking portions of same together so as to produce -a container that is capable of holding dough or other material that is to be baked.' rl`his method of constructing the container makes it possible to manufacture the container at a very low cost. owing to the fact that the inner lining B is arranged in operative position and combined with thek outer shell A in a single operation when the sheets constituting said inner lining and shell are fiat. It also enables a large number of blanks from which containers can be formed to be shipped and stored in a small space, due, of course, to the fact that the containers are fiat before they are set up.

In Figure 3 of the drawings I have illustrated a container embodying my invention that is adapted to' be used for baking a ring cake or baked article of annular. form. Said container embodies all of the desirable features and characteristics of the container illustrated in lligures 1 and 2, and is oomposed of an outer shell A formed of cardboard or other suitable material and an inner lining B formed of parchment paper or other suitable thin paper secured to the ind ner surface of said outer shell by paraffin or any other suitable material that willper-4 mit said inner lining to separate, pull away from or become detached from the outer shell during the baking operation, but which insures said inner lining adherin tightly to the outer shell when the doug is first placed in the container and during the first part of the baking operation. The container shown in Figure 3 comprises a side wall portion 2 provided with perforations or orifices l, a centrally-disposed, tubular-shaped member 3, which may or may not be per-` forated, and a bottom 4, which may or may not be perforated, sustained by ledges 2f* and 3 at the lower end of the side wall portion fires 1 is immaterial, but l prefer to form said orifices in such a manner that the portions of the inner lining surrounding said orifices bulge inwardly, and thus virtually form a series of projections on the inner side of the lining of the baking utensil.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent is:

1. A baking utensil composed of an outer shell constructed of flexible cardboard, and

a flexible paper inner lining arranged in engagement with the inner side of said vshell and connected to same by a means which permits said inner lining to separate' from the shell when the utensil .is subjected to heat, the sidewall portions of said shell and inner lining having aligned4 perforations. I A

2. A baking utensil composed of an outer shell constructed of flexible cardboard, and a flexible paper inner lining for said lshell connected to the inner side of same by a means which 'permits said inner linin to separate from the shell when the utensil is subjected to heat,ithe side wall portions of said shell and lining having perforations'v and lalso proJections that extend inwardly. EDWAIRD G. GEREKE 

